flutter Tooltip轻量级操作提示

import ‘package:flutter/material.dart‘;

class ToolTipDemo extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title:Text(‘tool tips demo‘)),
        body:Center(
          child: Tooltip(
            message: ‘提示：无法操作‘,
            child: Icon(Icons.all_inclusive),
          ),
        )
    );
  }
}